Thursday, July 2, 2020

DYMCO New English Site is Open !

DYMCO New English Site is Open !

Send your contacts from

Stay healthy.   DYMCO Overseas Team July 2, 2020

Wednesday, June 24, 2020

Hess Pumice Sand for Chinchilla bathing

Hess Pumice Sand for Chinchilla bathing

Due to the emergency declaration, 
'work from home' was introduced in Dymco in the middle of April.
Now the declaration was lifted.
We adopt staggered working hours from June 1.

So we work together again at our office.
We are finding little by little difference and merits of working in the office and working from home.

The second and third wave are predicted.
Also typhoons are coming.
DYMCO is preparing for those cases to continue our sales and production.

DYMCO is famous for its steel belts,
but we are doing sales of other interesting products.
As an Asian distributor of Hess Pumice Products, Inc. in the US, 
we import and sell their silica powders as abrasives.
They are used mainly for polishing glasses, metals, etc., 
but we also sell their powders as ChillDust, a product used for chinchilla sand baths.
Chinchillas and hamsters keep their bodies clean by bathing in sand.
Please look at this video, Hess Pumice Sand for Chinchilla bathing.

If you are interested in this sand for pet care,

please contact us or email to

Wednesday, June 17, 2020

Tough Times Drive Chances

Tough Times Drive Chances

May breeze has gone and we are in a rainy season here in Yokohama.

The first half of 2020 has been covered by news of "COVID-19, " the invisible new virus. 
We, DYMCO members, have taken preventive measures against infection.
We  adopted working from home and changing commuting hours.

We look at needs of masks and protective closing and 
think how we can help to ease this situation even a bit by our stainless steel belts.

Our belts are used in clean rooms.
Miscellaneous bacteria do not grow on our meltal belts.
If you have metal belts in mind in your applicataion,
Please contact us or email to

Tuesday, June 9, 2020

Relationship between steel belt and pulley diameter

Relationship between steel belt and pulley diameter

Various thicknesses and types of steel belts are chosen for each usage.
Then what about pulley diameter?
A large pulley is chose for a thick belt and a small one for a thin belt.
Here is a guideline in the technical information of Dymco's web site.

For power transmission open end belts,
pulley diameter = thickness x 400
example: belt thickness 0.1mm x 400 = pulley diameter 40mm

For welded type conveyor belts,
pulley diameter = thickness x 700

But when there are holes in the conveyor belt,
we recommend pulley diameter = thickness x 800
The graph below shows this relationship for conveyor belts.

                                                   Y:Belt thickness X:Pulley diameter

Yellow and green lines need smaller diameter than red and blue lines.
Yellow and green are stronger belts against bending stress than red and blue belts.

If you want to extend life of steel belts,
try to use larger pulley diameter than this guideline.

But when a load is not much, smaller diameter may be possible.

We recommend the best belt and pulley dimension for your application based on our stress calculation.
Please contact us or email to

Tuesday, June 2, 2020

High Friction Pads - Effects and Manufacturing Method

High Friction Pads - Effects and Manufacturing Method 

The Covid-19 is widespread globaly.
Many people get infected or even lose their lives.
In the beginning I thought it might be same as flu,
but it is a very horrifying virus, invisible and recognized only by electronic microscope.
We hope effective medicine and vaccination will be delveloped so soon.
Today I talk about surface treatments.
Have you ever heard of Tungsten carbide?
It is possible to creat high friction surface by spraying these particles onto the part.
High friction is realized by minute carbide metal protrusions after spraying.
These protrusions are super hard and have excellent wear resistance.
They firmly adhere to the part or the substrate.
This surface can be made on a limited area of the parts where wear resistance is required.
Both surface of shims can be wear resistant, too.
High friction surface, why is it demanded?

(1)  make only limited area of the part anti friction and non-slip
(2) fasten the bolt tight and non loose by adding a ring shaped sheet
(3) make smaller and lighter the fastening part where a large amount of inertia is applied
Our customers adopt this furface aiming at these effects.

Ultra Thin High Friction Pads and Sheets
Please contact Dymco for small and thin parts requiring wear resistance.


Tuesday, May 26, 2020

Easy-to-Clean Metal Belt Food Conveyor

Easy-to-Clean Meta Belt Food Conveyor

Emergency declaration was lifted here in Japan yesterday.

Still COVID-19 threat exists. 
In DYMCO we continue to work from home and make use of web conferences.
Social distance, masks, ventilation, and washing hands have become are our new behaviors.

In such a situation, we feel motivation is growing to keep clean transport equipment especially in the food and medical industries.

Easy to clean is our  “Food Steel Belt Conveyor
The belt, frames and all parts are made of stainless steel.
Disassembly, cleaning and washing are very easy.
DYMCO Steel Belt Conveyor for Food Hygiene Management
There is little 凹凸 on the stainless steel belt surface.
Please wipe with alcohol or wash with water at the end of work.
The belt is soon dry and kept clean.

Also, by additional surface treatments other functions may be acquired on the belt.
This is an issue to be discussed.
Please contact us or email to

Tuesday, May 19, 2020

Over 50 Rich Grades Variations - Hess Pumice Amorphous Precision Abrasives

Over 50 Rich Grades Variations - Hess Pumice Amorphous Precision Abrasives

Dymco is a steel belt maker. 

We are proud of precision, flatness, and smoothness of our belts., etc.

We also work as the Asian representative of Hess Pumice Products in the United States,
importing to Japan and exporting to Asia their silica abrasives.

Pumice of Hess is non-crystalline silica and harmless to human bodies.
It is harder than other silica powders, resulting in higher grinding efficiency.
This is used as abrasives for glasses and metals in Japan and PCB substrates in Asia.

Hess Pumice Production Site

Hess silica abrasives

Microscope picture of Hess Silica abrasives
There are many long processes in polishing from rough to intermediate and finish.
Also, some users target to improve surface roughness, 
while others target to remove deposits.
Hess abrasives lineup ranges from the minimum average particle 3 microns and
includes many grades (particle size distribution) exceeding 50.

Customers can choose the most suitable grade according to usage, polishing objects, purpose, process, etc.

Hess also offers the low heavy mineral powders.
Heavy minerals in abrasives are just 0.1% or even less by their precise crushing,
selection technology and strict quality control.
It is possible to provide the samples free of charge,
so please be free to contact us
or Hess Pumice

Sunday, May 10, 2020

Hygienic Stainless Steel Belt

                                                  Hygienic Stainless Steel Belt

We are facing COVID-19 now.  This is fight against virus.

In the food industry have been repeated food poisoning and food product contamination due to bacteria growth.

One reason is hygiene management on food process machines and food transport systems.

Generally, we can clean metal much more easily than organic materials like resin and rubber.
Especially stainless steel demonstrated little possibility of rusts.
So this metal has been used in the food processing industry and water related parts like sinks and faucets.
DYMCO is an expert of stainless steel belts.
Our belts are hygiene and emit little dusts, serving as a good transport tool in the food industry and clean-room operations.

Reference in our site: * Problems with Contamination / Cleaning / Residual odors ?

* Problems with Dust Generation / Particle Contamination ?

We wish everyone stays healthy.

Monday, May 4, 2020

Plastic Film Cooling by a Face Touch Roll

 Plastic Film Cooling by a Face Touch Roll
Dymco has started to work from home as a measure against COVID-19. 
We continue to hold regular meetings inside our company by Microsoft  Teams. 
We attend them from home, completely avoiding contacts among members and spread of virus.
On the other hand, we have no choice but to come to the office for on-site works like improvements and evaluation of devices.
We would like to work on development themes efficiently,
although it is not certain how long this situation goes on.

Once in this blog I introduced Dymco's "cooling roll."
This roll is tripled.  From the outer surface, there are a thin electroformed sleeve, cooling water and rubber.
Cooling water flows in clearance between the outside sleeve and rubber. 
This rubber covers the core of this roll.

When this roll is pressed against the cooling target, the outside thin sleeve is pressed and creats face touch.
The performance depends on how much this face contact area is obtained.
In addition, we need to obtain data how much heat is removed by this roll.
So we are working to prepare evaluation equipment like the one in the picture below.
Cooling Test by Our Cooling Roll

We delivered φ100 × 950L for trial so far.
Now larger size is possible.
There is size restrictions in electroformed sleeves.
But please be free to contact us at

Wednesday, April 29, 2020

Metal Belt Conveyors on Video

Metal Belt Conveyors on Video

The Japanese Gov'nt declared a  state of emergency against COVID-19 on April 7.
We are still in trouble.
Dymco turned to work from home from April 14th.
We are not familiar with working from home and sometimes feel uneasy and inconvenient.
But we find advantages, too.
I concentrate on my work without interruption of phone calls. 
And of course time for commuting is none. 
So now I can fully work on things that I couldn't do when  I was busy.

By the way, do you know  "Dymco Video Collection" in our site?

I like this very much.
Videos of many kinds of metal belt transport go on and on. 

If you have time, why not turnig this video theater?

And when you have questions,
please contact
or ask at

Thursday, April 16, 2020

Double Steel Belt Heat and Press Conveyor
Our customers use this conveyor in many ways.
They continuously heat and press the work,
keep the work in a certain temperature between the 2 belts, like plants in a green house,
laminate two material to make a new function.

In general the double steel belt conveyor presses the work with rollers.
However, DYMCO's conveyor does not press by rollers,
but uses square heaters and press the work.
Heating and pressing are done in an area, not in a line pressed by rollers.
Out conveyor is unique on this point and this improves productivity.

Our demonstration conveyor holds the cooling unit, too.
So cutomers can test heating and cooling in a streamline.
Of course we can set heating and cooling time, as well as continuous pressure and speed.

Friday, April 10, 2020

Continuous Inspection of Both Surfaces by Vacuum Conveyor

Continuous Inspection of Both Surfaces by Vacuum Conveyor
We receive many inquiries on continuous inspection on both surfaces of a transported work.
Actually more customers come to DYMCO from distant places
as they find our vacuum conveyor in our web site and get interested in it.
Their works are films, sheets, metal foils, glass etc. used for secondary batteries and electronic devices.
Expansion of IoT pushes those demands.

Rotary tables and single-axis robots may be choices when you inspect both surfaces.
But since they move back and forth, it is quite difficult to shorten cycle time.
Production lines also get complicated.
Why not trying our vacuum conveyor if you need to inspect both surfaces seamlessly in a simple form? 

Inspection of suface by the 1st vacuum conveyor.
By the 2nd vacuum conveyor, back surface is inspected.
Cleaning of both surfaces is also possible without turning around works.
Inquiry Form:


Friday, April 3, 2020

Remote Monitoring on Steel Belt Vacuum Conveyor

Remote Monitoring on Steel Belt Vacuum Conveyor 

In February this year, "Technical Show Yokohama 2020" was held at Pacifico Yokohama Exhibition Hall.
One of exhibitors, JSP Co., Ltd., introduced Dymco's suction conveyor.
The real suction conveyor was not in the booth, but in Dymco,  20 km away from this hall.

Before this exhibition JSP came to Dymco and set their remote communiction device upon our suction conveyor so that JSP can drive it in their booth.

JSP observed electric current by sensors.  Also the attched camera sent images how the conveyor was running.  They received all these info in their booth.

Especially they demonstrated an alarm function telling abnormal operation. 

Exhibition booth of JSP Co., Ltd.

Please look at the video below, showing vacuum transport of our steel belt conveyor with remote monitoring device set.

We will continue to examine failure prediction, safe operation, and such
so that our conveyors could provide safety and reliabity to our customers.

Friday, March 27, 2020

Low cost standard steel belt conveyor for your first trial

Low cost standard steel belt conveyor for your first trial

We have standard steel belt conveyors.
Especially the small one is the best for users, who use steel belts for the first time.

Steel belts are employed for particular reasons like clean room, hygiene food transport, heating and drying, and vacuum environment.

If you need to tackle contamination, particles, static electricity, vibration, very flat transport surface, we recommend to try this conveyor first for evaluation of effects with metal belts.
For the small size conveyor we offer the special price.


Thursday, March 12, 2020

Polished Metal Sleeves

Polished Metal Sleeves

One of our product line up is thin wall metal sleeve.  Thickness 0.1 to 0.3mm.
We can polish its surface up to Rz 0.1μm and less, same as JIS-‘01.
Much higher value of Rz is OK.
Also surface roughness and waves can be discussed.
The picture below is a polishsed Nickel seamless sleeve.

Polished Nickel Seamless Sleeve
In this picture we can find dots of a surface stone plate,
but those dots are not reflected on the inner surface.
The outer surface is finer than the inner surface
Further polishing is possible on this outer surface.  We also polish stainless steel sleeves.
Our polishing range and specs are flexible.
For details please contact for detailas.
We can offer various levels of polishing including limited area of polishing. 

Friday, March 6, 2020

Best for Inspection - Stainless Steel Belt Conveyor and Vacuum conveyor

Best for Inspection - Stainless Steel Belt Conveyor and Vacuum conveyor

New coronavirus is getting serious here.
Although DYMCO is working as usual, schools are closed.
People's gatherings, events and business meetings are cancelled.
And now we know that virus inspection system is not sufficient here.
There are cases that people in need cannot apply inspection.
In the manufacturing industry, too, inspection is getting more important than ever to assure product quality.
Our metal belt conveyors are very good in 2 things when used for inspection.
1、Flat transport surface
Rigid metal belt convey things and yet serves flat transport surface.
Plastic and rubber belts cannot reach here.
2、Foils and films, very thin material is also transported in flat state.
Metal belt can hold air suction holes and realizes suction or vacuum transport.
Once film is placed on this belt, film does not move or fly away.
Its position on the belt is kept as it is and conveyed in flat state.
Tension is not applied either, so film is not stretched nor contracted.

For these reasons our customers adopt our metal belt conveyors for inspection.
Please contact



Thursday, February 27, 2020

100% Natural Power Pumice, Non Christal Silica Powders

100% Natural Power Pumice, Non Christal Silica Powders

DYMCO sells steel belts.
And one more thing.  It is Power Pumice, 100% natural silica powders.
We are Asian Representative of Hess Pumice Products, Inc. in Idaho in the U.S. and sell their natural pumice in Japan, China and other Asian countries.

Power Pumice is used as abrasives, paint filler, filtering media, etc.
Large powders are granular, small ones are fine powders.
These are mainly composed of a kind of silica.
Environmentally friendly powders are used in many ways in our daily lives.

Environmentaly Friendly Power Pumice

Powders are porous, excellent in "breathability" and "water absorption."
So they are suitable for horticultural soil and sands for pets.
We can magine that in the future pumice may serve best for hydroponics.
Hydroponics is expected to be tough against higher temperature by global warmng.
For details of Power Pumice, please contact  or